Improvement in ooffee-eoastebs



THEODORE HF..ERMANS,` OF ILEASANT HILL, lul/IlaSOURI.I

-l YLetters Potent No. 79,4b9,vc2lated June 30, 1868. Y

IMPROVEMENT IN COFFEE-ROASTERS. T

@its Signale referat tu in there rtrrs @tout mit mitin-g part rf ttt trims.

VTO ALL WHOM 'IT MAY CONCRN;

Beit known that I,` THEoDoRE HEERMANS, of Pleasant Hill, in the county of Cass, land State of Missouri,

have made certain new and useful Improvements in- Coffee-Roaster; and do hereby declare that the following is a full and clear description thereof, reference beinghad to the accompanying drawings, and to the letters of reference marked thereon.

'This invention relates to a rotating coiiee-roaster, wherein a.- wire cylinder is placed eecentrically within a closed'metallic cylinder, the closed cylindeixbeing provided withl a'l window, through which the progress of the roasting-operation may.be' 'witnes sed from without, without the necessity of opening the door, by doing which the aroma of the patching coffee'would be to a considera-ble ex tentlost. Although I prefer arranging the wire cylinder eccentrically within the other, it is clearly within thescope of my invention to place'the two cylinders concentric. K y y To enable those skilledinthe art to make and use my improved ronster,-I will proceed to describe its con--- struction and operation. l I Figure 1 of the drawings is a longitudinal sectional elevation of the improved apparatus.

Figure 2 is a` front end elevation` andl Figure 3 is a transverse sectional elevation.

The Ere-basket A may be of any convenient or desirable formuler may even be wholly dispensed with 'by tting the roaster to set on top ofl-astove or furnace. The frame or posts B will be so constructed and arranged as to furnish hearings for the axle C, which sustains the cylinders D E, and by means of which the said cylinders are revolved. The outer one ofthese cylinders, D,`is of sheet metal, andthe axle C passes diametrically through its centre. In one en d of this cylinder is a small slide door, d, through which the cofee is to beintroduced into v and. withdrawn from the cylinder. Within this outer cylinder, andarranged eccentrically on the same axle, is the cylinder E, of wire-'cloth or perforated sheet `rnetal. .It may be necessary, in construction, to make one e extra head e for' this inner cylinder, while the other `end of it may readily be secured to Ithe head of the outer cylinder. I prefer to maize the inner cylinder of wire cloth,` as being betterl adapted to the purpose, but a perforated sheet-metal cylinder might answer the purpose. The wire cloth will act better upon the coffee, by causing the kernels to roll over `:index-pose all of their sides to the heat, whereas, in the sheet-metal cylinder,the 'tendency would be to allow ,the kernels to slide around on the revolving cylinder, without exposing the different 'sides to the action of the heat. In one end of thecylinder D, I placca smallwindow, d', through which the progress ,of roasting may be witnessed at all stages 'of the operation.

The apparatus being constructed as above described, and filled with green coifee, it may be placed over the re, and left to remain in a stationary position while the coffee is being dried. When the fire over whiohit is placed is of moderate intensity, during the drying operation, that side of the roaster having the greatest distancegbetwcen the cylinders will be turned down,so as to keep the cotl'ee a suilcient distance from the heated plateshof the outer cylinder, to-iprevent burning any portion .of-it. When, however, the fire is low, or it is desirable te accelerate the operation, that side having `thesinallest distance between-the eylindersmay be turned Y next the fire. The oce of the inner cylinder will at all times be to keep the coffee o` oflthe heated plates of the outer cylinder, to prevent its burning, and the eccentricity of the inner cylinder is for the purpose of regulating the degree of heat, bythe distanceI between the cylinders. During the drying process it will b e necessary to revolve the cylinder occasionally.

- Having described myinvention, what I claim, is-

lhe wire cloth or perforated cylinder E, when arranged eccentrically within the outer cylinder D, as described and for the purpose set forth.

THEoDoRE HEERMA-Ns.

Witnesses:

M. RANDOLPH, Geo. P. HER'TnsL, Jr. 

